根据周二发布的一项研究，到2030年，为应对电动汽车增长，欧洲城市需要近250亿欧元（约合279.4亿美元）的充电基础设施投资，但通过智能充电可将账单削减40%。
Europe's cities need almost €25 billion ($27.94 billion) of investment in charging infrastructure to cater for the growth of electric vehicles by 2030 but could cut the bill by 40% through smart charging, according to a study released on Tuesday.
西门子进行的这项研究预测，在分析的27个欧盟国家以及冰岛、列支敦士登和挪威的64个城市中，电动汽车数量平均将增长3.8倍，导致电力配电网投资账单达到247亿欧元。
The study conducted by Siemens forecasts the number of EVs will grow on average by 3.8 times in 64 cities analysed across the 27 EU countries, along with Iceland, Liechtenstein and Norway, leading to a €24.7 billion bill for electricity distribution grid investment.
研究指出，智能电表可让车辆在现有电力需求最低时充电（如深夜），最终可将总投资账单削减106亿欧元。
The study said that smart meters to allow charging when existing electricity demand is the lowest, such as in the middle of the night, could ultimately cut the overall investment bill by €10.6 billion.
论文称，欧盟委员会提出在整个集团推广可预测且更便宜的谷电价，有助于消费者转移用电时段。
The paper said that a European Commission proposal to promote predictable and cheaper off-peak prices across the bloc could help consumers shift.
这项由欧洲电动汽车充电行业协会ChargeUp、汽车制造商协会ACEA及合作伙伴组织EIT Urban Mobility委托的研究发现，最大的投资需求在于低压电网投资，以支持家庭或工作场所等较慢速的充电。
The study for European EV charging industry association ChargeUp, auto manufacturers group ACEA and partnering group EIT Urban Mobility found that the greatest investment need was for low-voltage grid investments, allowing slower charging such as at homes or workplaces.
研究称，投资需求最高的将是德国，其次是已拥有大量电动汽车车队的国家，即挪威、比利时和荷兰。东欧地区的电动汽车普及增速将最快，但起步基数较低。
The investment requirement would also be highest in Germany, followed by countries already with significant EV fleets, namely Norway, Belgium and the Netherlands. EV uptake would grow fastest in eastern Europe, the study said, but from a lower base.